diff --git a/Makefile b/Makefile
index 8cfbc8b..65ea437 100644
--- a/Makefile
+++ b/Makefile
@@ -27,10 +27,10 @@ launcher:
 	docker build -t $(TAGBASE)-launcher ./launcher-image
 
 run-launcher: launcher
-	docker run -v /var/run/docker.sock:/var/run/docker.sock -it --rm $(TAGBASE)-launcher
+	docker run -e JOBS=4 -v /var/run/docker.sock:/var/run/docker.sock -it --rm $(TAGBASE)-launcher
 
 run-launcher-detached: launcher
-	docker run -v /var/run/docker.sock:/var/run/docker.sock -itd --rm $(TAGBASE)-launcher
+	docker run -e JOBS=8 -v /var/run/docker.sock:/var/run/docker.sock -itd --rm $(TAGBASE)-launcher
 
 # wizzard
 wizzard: mirror run-creator 
diff --git a/launcher-image/src/cron-command b/launcher-image/src/cron-command
index 76f59c8..4f0941a 100755
--- a/launcher-image/src/cron-command
+++ b/launcher-image/src/cron-command
@@ -8,6 +8,7 @@ lock=/var/run/cloner.pid
 volume_prefix=cloner
 clone_prefix=cloner-runner
 
+max_jobs=${JOBS:-3}
 
 function die(){
 	echo $@ 1>&2
@@ -35,5 +36,5 @@ function listVolumes(){
 }
 
 # run for every volume in parallel
-listVolumes | parallel --lb -j 3 -n 1 run-mirror-update
+listVolumes | parallel --lb -j $max_jobs -n 1 run-mirror-update